Photoelectric hybrid board, information processor, and method for manufacturing photoelectric hybrid board

Abstract

A photoelectric hybrid board includes: a first board on which a circuit is formed; an optical waveguide layer stacked with the first board; a first optical waveguide section formed in a direction of stacking in the first board and the optical waveguide layer; and a concave part formed, from the optical waveguide layer side, in the optical waveguide layer in an intersection part of the optical waveguide layer and the first optical waveguide section.

What is claimed is: 
     
       1. A photoelectric hybrid board comprising:
 a first board on which a circuit is formed; 
 an optical waveguide layer stacked with the first board; 
 a first optical waveguide section formed in a direction of stacking in the first board and the optical waveguide layer; and 
 a concave part formed, from the optical waveguide layer side, in the optical waveguide layer in an intersection part of the optical waveguide layer and the first optical waveguide section, 
 wherein the concave part has a conical surface that extends conically, and 
 wherein the conical surface has a reflection surface inclined to the optical waveguide layer at an angle of 45 degrees, and the reflection surface reflects light entering the first optical waveguide section to the optical waveguide layer. 
 
     
     
       2. The photoelectric hybrid board according to  claim 1 , further comprising:
 a second board arranged on an opposite side to the first board on the optical waveguide layer; and 
 the second board has a cylindrical opening connecting to the concave part. 
 
     
     
       3. The photoelectric hybrid board according to  claim 2 ,
 wherein a centerline of the opening is displaced from a centerline of the first optical waveguide section. 
 
     
     
       4. The photoelectric hybrid board according to  claim 2 ,
 wherein an inside diameter of the opening is larger than a width of the first optical waveguide section. 
 
     
     
       5. The photoelectric hybrid board according to  claim 1 , further comprising:
 a light emitting section mounted on the first board and configured to emit light to the first optical waveguide section. 
 
     
     
       6. The photoelectric hybrid board according to  claim 5 ,
 wherein the light emitting section converts an electric signal from the circuit into an optical signal. 
 
     
     
       7. The photoelectric hybrid board according to  claim 1 , further comprising:
 a second optical waveguide section formed in the first board and the optical waveguide layer in the direction of stacking; and 
 a light receiving section mounted on the first board and configured to receive light exiting from the second optical waveguide section. 
 
     
     
       8. The photoelectric hybrid board according to  claim 7 ,
 wherein the light receiving section converts an optical signal received by the light receiving section into an electric signal. 
 
     
     
       9. An information processor, comprising
 a photoelectric hybrid board including 
 a first board on which a circuit is formed; 
 an optical waveguide layer stacked with the first board; 
 a first optical waveguide section formed in a direction of stacking in the first board and the optical waveguide layer; and 
 a concave part formed, from the side of optical waveguide layer, in the optical waveguide layer in an intersection part of the optical waveguide layer and the first optical waveguide section, 
 wherein the concave part has a conical surface that extends conically, and 
 wherein the conical surface has a reflection surface inclined to the optical waveguide layer at an angle of 45 degrees, and the reflection surface reflects light entering the first optical waveguide section to the optical waveguide layer. 
 
     
     
       10. A method for manufacturing a photoelectric hybrid board, comprising:
 stacking a first board and an optical waveguide layer; 
 forming a through-hole in the first board and the optical waveguide layer in a direction of stacking; 
 filling the through-hole with an optical waveguide structural material to form an optical waveguide section; and 
 forming a concave part having an inclined surface in an intersection part of the optical waveguide layer with the optical waveguide section, 
 wherein the concave part has a conical surface that extends conically, and 
 wherein the conical surface has a reflection surface inclined to the optical waveguide layer at an angle of 45 degrees, and the reflection surface reflects light entering the first optical waveguide section to the optical waveguide layer. 
 
     
     
       11. The method for manufacturing the photoelectric hybrid board, according to  claim 10 ,
 wherein the forming of a concave part forms a concave part such that a centerline of the concave part is displaced from a centerline of the optical waveguide section.